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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-01-16 18:52:14 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-01-17 21:00:44 -0800 |
| commit | 49db55eca5665e32c9d3e67a7d5694bcc6c274de (patch) | |
| tree | e739e377b05d0e3e7cf8e410fcabf4b3066cdabc /fs/xfs/libxfs | |
| parent | ed7c52d4bf92ac1f05b8c251a44a8bf4688f8786 (diff) | |
| download | linux-49db55eca5665e32c9d3e67a7d5694bcc6c274de.tar.bz2 | |
xfs: add scrub cross-referencing helpers for the refcount btrees
Add a couple of functions to the refcount btrees that will be used
to cross-reference metadata against the refcountbt.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_refcount.c | 19 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_refcount.h | 3 |
2 files changed, 22 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_refcount.c b/fs/xfs/libxfs/xfs_refcount.c index c40d26763075..bee68c23d612 100644 --- a/fs/xfs/libxfs/xfs_refcount.c +++ b/fs/xfs/libxfs/xfs_refcount.c @@ -1696,3 +1696,22 @@ out_cursor: xfs_trans_brelse(tp, agbp); goto out_trans; } + +/* Is there a record covering a given extent? */ +int +xfs_refcount_has_record( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool *exists) +{ + union xfs_btree_irec low; + union xfs_btree_irec high; + + memset(&low, 0, sizeof(low)); + low.rc.rc_startblock = bno; + memset(&high, 0xFF, sizeof(high)); + high.rc.rc_startblock = bno + len - 1; + + return xfs_btree_has_record(cur, &low, &high, exists); +} diff --git a/fs/xfs/libxfs/xfs_refcount.h b/fs/xfs/libxfs/xfs_refcount.h index eafb9d1f3b37..2a731ac68fe4 100644 --- a/fs/xfs/libxfs/xfs_refcount.h +++ b/fs/xfs/libxfs/xfs_refcount.h @@ -83,4 +83,7 @@ static inline xfs_fileoff_t xfs_refcount_max_unmap(int log_res) return (log_res * 3 / 4) / XFS_REFCOUNT_ITEM_OVERHEAD; } +extern int xfs_refcount_has_record(struct xfs_btree_cur *cur, + xfs_agblock_t bno, xfs_extlen_t len, bool *exists); + #endif /* __XFS_REFCOUNT_H__ */ |